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#1
July 15th 12, 09:48 PM
posted to rec.aviation.soaring
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Measured current draw, PowerFlarm Brick
PF manual does not list typical power consumption. Because PowerFlarm
can supply power to other devices, this is a variable figure. The manual says only "up to 1.2 Watts", or 1 amp at 12V. That's rather a lot, so I decided to check. My PF brick is connected to a Butterfly 57mm flarm panel display and ClearNav (via serial port). I measure 170 mA at 12.4 VDC, which is reassuringly small. -Evan Ludeman / T8 
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#2
July 15th 12, 09:55 PM
posted to rec.aviation.soaring
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Measured current draw, PowerFlarm Brick
On Sunday, July 15, 2012 1:48:25 PM UTC-7, Evan Ludeman wrote:
PF manual does not list typical power consumption. Because PowerFlarm can supply power to other devices, this is a variable figure. The manual says only "up to 1.2 Watts", or 1 amp at 12V. That would be 100mA at 12V. Bart
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#3
July 15th 12, 10:07 PM
posted to rec.aviation.soaring
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Measured current draw, PowerFlarm Brick
On Sunday, July 15, 2012 1:55:51 PM UTC-7, wrote:
On Sunday, July 15, 2012 1:48:25 PM UTC-7, Evan Ludeman wrote: > PF manual does not list typical power consumption. Because PowerFlarm > can supply power to other devices, this is a variable figure. The > manual says only "up to 1.2 Watts", or 1 amp at 12V. That would be 100mA at 12V. Bart Did you make independent measurements?, Based on the quoted measurement and assuming ideal power behavior it would be ~165mA at 12.0 VDC. Actual power consumption will depend to some extent on the environment (e.g. other equipped gliders nearby etc.). Darryl
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#4
July 15th 12, 10:15 PM
posted to rec.aviation.soaring
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Measured current draw, PowerFlarm Brick
On Jul 15, 2:07*pm, Darryl Ramm wrote:
> can supply power to other devices, this is a variable figure. *The > manual says only "up to 1.2 Watts", or 1 amp at 12V. That would be 100mA at 12V. Did you make independent measurements?, Based on the quoted measurement and assuming ideal power behavior it would be ~165mA at 12.0 VDC. Me? I have not measured anything. I only stated that 1.2W at 12V requires current draw of 100mA, not 1A. Bart
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#5
July 16th 12, 12:03 AM
posted to rec.aviation.soaring
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Measured current draw, PowerFlarm Brick
On Jul 15, 4:55*pm, wrote:
On Sunday, July 15, 2012 1:48:25 PM UTC-7, Evan Ludeman wrote: PF manual does not list typical power consumption. *Because PowerFlarm can supply power to other devices, this is a variable figure. *The manual says only "up to 1.2 Watts", or 1 amp at 12V. That would be 100mA at 12V. Bart You're right, of course. I got busy reading about a few hundred milliamps for this in, 500 for that (at +3 or +5V, not 12) and slipped the decimal. Oops. In any case, 170 mA is a pretty good measurement. That's sitting in my driveway with GPS and flarm transmission active, no threats. -Evan / T8
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